From f360082c755899874f8e1bd6335237873495f743 Mon Sep 17 00:00:00 2001
From: Dooho Yi <pilotedeguerre@gmail.com>
Date: Wed, 11 Dec 2019 15:50:44 +0900
Subject: [PATCH] minor update for postman.

---
 src/main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 8b7a3ed..4789c0a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -230,7 +230,7 @@ void receivedCallback(uint32_t from, String & msg) { // REQUIRED
   msg = msg.substring(0, POST_LENGTH); // (0) ~ (POST_LENGTH-1)
   // send whatever letter we postmans trust other postman.
   Wire.beginTransmission(I2C_ADDR);
-  Wire.write(msg.c_str());
+  Wire.write(msg.c_str(), POST_LENGTH);
   Wire.endTransmission();
 }
 void changedConnectionCallback() {